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TROUBLESHOOTING & REPAIR
F-27 F-27
PRO-CUT 25
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TORCH CONTINUITY AND SOLENOID TEST (continued)
TABLE F.1 - TORCH ASSEMBLY RESISTANCES
TEST CIRCUIT(S) BEING EXPECTED TEST
POINTS TESTED RESISTANCE CONDITIONS
Lead #2 Pilot arc 1.5 ohms maximum Torch consumables
To Lead #3 leads in place
Lead #2 to Torch Pilot arc lead to 1.0 ohm maximum Torch consumables
Nozzle nozzle in place
Lead #3 to Torch Pilot arc lead to 1.0 ohm maximum Torch consumables
Nozzle nozzle in place
Pin 1 to Pin 2 Torch trigger circuit 100K ohms minimum Torch trigger NOT
Plug J1 (Red Leads) pulled (not activated)
Pin 1 to Pin 2 Torch trigger circuit 1.0 ohm maximum Torch trigger pulled
Plug J1 (Red Leads) (activated)
Pin 3 to Pin 4 Electrode Solenoid 45 to 55 ohms None
Plug J1 (Gray Leads)
10. Torch circuits may be measured when elec-
trode and nozzle are in place if the various cir-
cuits are isolated from each other. NZL (2),
Electrode (3), Trigger (1,2), and Torch leads (3,4)
should all measure greater than 1 Meg ohm when
checked as isolated circuits. See Figure F.10
Diagram.
11. Replace leads and plugs previously
removed.
(LEAD 2) NZL
WRK
(LEAD 3) EL
Harness
Plug J1
1
2
3
4
Figure F.11